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GD25LE256DFEG データシート(PDF) 63 Page - GigaDevice Semiconductor (Beijing) Inc.

部品番号 GD25LE256DFEG
部品情報  1.8V Uniform Sector Dual and Quad Serial Flash
PDF  83 Pages
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メーカー  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
ホームページ  http://www.gigadevice.com/
Logo GIGADEVICE - GigaDevice Semiconductor (Beijing) Inc.

GD25LE256DFEG データシート(HTML) 63 Page - GigaDevice Semiconductor (Beijing) Inc.

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1.8V Uniform Sector
Dual and Quad Serial Flash
GD25LE256D
63
7.41. Read Serial Flash Discoverable Parameter (5AH)
The Serial Flash Discoverable Parameter (SFDP) standard provides a consistent method of describing the functional
and feature capabilities of serial flash devices in a standard set of internal parameter tables. These parameter tables can
be interrogated by host system software to enable adjustments needed to accommodate divergent features from multiple
vendors. The concept is similar to the one found in the Introduction of JEDEC Standard, JESD68 on CFI. SFDP is a standard
of JEDEC Standard No.216.
Figure43. Read Serial Flash Discoverable Parameter command Sequence Diagram
Command
0
1
2
3
4
5
6
7
5AH
CS#
SCLK
SI
SO
High-Z
8
9 10
28 29 30 31
3
2
1
0
23 22 21
24-bit address
MSB
34 35 36 37
33
6
5
4
3
2
1
0
38 39
Data Out1
32
42 43 44 45
41
46 47
40
7
6
5
4
3
2
1
0
7
6
5
7
Data Out2
CS#
SCLK
SI
SO
MSB
Dummy Byte
Figure43a. Read Serial Flash Discoverable Parameter command Sequence Diagram (QPI)
CS#
SCLK
IO0
IO1
IO2
IO3
0
1
2
3
4
5
Command
5AH
20
12
16
8
6
7
8
9
10
4
4
0
0
4
0
4
0
4
21
13
17
9
5
5
1
1
5
1
5
1
5
22
14
18
10
6
6
2
2
6
2
6
2
6
23
15
19
11
7
7
3
3
7
3
7
3
7
A23-16 A15-8
A7-0
Dummy*
11
12 13
IOs switch from
Input to output
Byte1
Byte2



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